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Message-ID: <1410511739-31122-3-git-send-email-b38343@freescale.com>
Date: Fri, 12 Sep 2014 16:48:58 +0800
From: Robin Gong <b38343@...escale.com>
To: <robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>,
<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
<shawn.guo@...escale.com>, <kernel@...gutronix.de>,
<sre@...nel.org>, <dbaryshkov@...il.com>, <dwmw2@...radead.org>,
<grant.likely@...aro.org>, <linux@....linux.org.uk>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-pm@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH v2 2/3] power: reset: imx-snvs-poweroff: add power off driver for i.mx6
Add simple power off driver for i.mx6.
Signed-off-by: Robin Gong <b38343@...escale.com>
---
drivers/power/reset/Kconfig | 6 +++
drivers/power/reset/Makefile | 1 +
drivers/power/reset/imx-snvs-poweroff.c | 69 +++++++++++++++++++++++++++++++++
3 files changed, 76 insertions(+)
create mode 100644 drivers/power/reset/imx-snvs-poweroff.c
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index ca41523..c48d9ba 100644
--- a/drivers/power/reset/Kconfig
+++ b/drivers/power/reset/Kconfig
@@ -45,6 +45,12 @@ config POWER_RESET_HISI
help
Reboot support for Hisilicon boards.
+config POWER_RESET_IMX
+ bool "IMX6 power-off driver"
+ depends on POWER_RESET && SOC_IMX6
+ help
+ Power off support for i.mx6 boards.
+
config POWER_RESET_MSM
bool "Qualcomm MSM power-off driver"
depends on POWER_RESET && ARCH_QCOM
diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
index a42e70e..2524daf 100644
--- a/drivers/power/reset/Makefile
+++ b/drivers/power/reset/Makefile
@@ -3,6 +3,7 @@ obj-$(CONFIG_POWER_RESET_AXXIA) += axxia-reset.o
obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o
obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o
obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o
+obj-$(CONFIG_POWER_RESET_IMX) += imx-snvs-poweroff.o
obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o
obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o
obj-$(CONFIG_POWER_RESET_RESTART) += restart-poweroff.o
diff --git a/drivers/power/reset/imx-snvs-poweroff.c b/drivers/power/reset/imx-snvs-poweroff.c
new file mode 100644
index 0000000..55603ba
--- /dev/null
+++ b/drivers/power/reset/imx-snvs-poweroff.c
@@ -0,0 +1,69 @@
+/* Power off driver for i.mx6
+ * Copyright (c) 2014, FREESCALE CORPORATION. All rights reserved.
+ *
+ * based on msm-poweroff.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+
+#include <asm/system_misc.h>
+
+static void __iomem *snvs_base;
+
+static void do_imx_poweroff(void)
+{
+ u32 value = readl(snvs_base);
+
+ /* set TOP and DP_EN bit */
+ writel(value | 0x60, snvs_base);
+}
+
+static int imx_poweroff_probe(struct platform_device *pdev)
+{
+ snvs_base = of_iomap(pdev->dev.of_node, 0);
+ if (!snvs_base) {
+ dev_err(&pdev->dev, "failed to get memory\n");
+ return -EIO;
+ }
+
+ pm_power_off = do_imx_poweroff;
+ return 0;
+}
+
+static const struct of_device_id of_imx_poweroff_match[] = {
+ { .compatible = "fsl,sec-v4.0-poweroff", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_imx_poweroff_match);
+
+static struct platform_driver imx_poweroff_driver = {
+ .probe = imx_poweroff_probe,
+ .driver = {
+ .name = "imx-snvs-poweroff",
+ .of_match_table = of_match_ptr(of_imx_poweroff_match),
+ },
+};
+
+static int __init imx_poweroff_init(void)
+{
+ return platform_driver_register(&imx_poweroff_driver);
+}
+device_initcall(imx_poweroff_init);
--
1.9.1
--
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